var setting = {
    edit: {
        drag: {
            autoExpandTrigger: true,
            prev: dropPrev,
            inner: dropInner,
            next: dropNext
        },
        enable: true,
        showRemoveBtn: false,
        showRenameBtn: false
    },
    data: {
        simpleData: {
            enable: true
        }
    },
    callback: {
        beforeDrag: beforeDrag,
        beforeDrop: beforeDrop,
        beforeDragOpen: beforeDragOpen,
        onDrag: onDrag,
        onDrop: onDrop,
        onExpand: onExpand
    }
};

var zNodes = [
    {id: 1, pId: 0, name: "随意拖拽 1", open: true},
    {id: 11, pId: 1, name: "随意拖拽 1-1"},
    {id: 12, pId: 1, name: "随意拖拽 1-2"},
    {id: 121, pId: 12, name: "随意拖拽 1-2-1"},
    {id: 122, pId: 12, name: "随意拖拽 1-2-2"},
    {id: 123, pId: 12, name: "随意拖拽 1-2-3"},
    {id: 13, pId: 1, name: "禁止拖拽 1-3", open: true, drag: false},
    {id: 131, pId: 13, name: "禁止拖拽 1-3-1", drag: false},
    {id: 132, pId: 13, name: "禁止拖拽 1-3-2", drag: false},
    {id: 132, pId: 13, name: "禁止拖拽 1-3-3", drag: false},
    {id: 2, pId: 0, name: "禁止子节点移走 2", open: true, childOuter: false},
    {id: 21, pId: 2, name: "我不想成为父节点 2-1", dropInner: false},
    {id: 22, pId: 2, name: "我不要成为根节点 2-2", dropRoot: false},
    {id: 23, pId: 2, name: "拖拽试试看 2-3"},
    {id: 3, pId: 0, name: "禁止子节点排序/增加 3", open: true, childOrder: false, dropInner: false},
    {id: 31, pId: 3, name: "随意拖拽 3-1"},
    {id: 32, pId: 3, name: "随意拖拽 3-2"},
    {id: 33, pId: 3, name: "随意拖拽 3-3"}
];

function dropPrev(treeId, nodes, targetNode) {
    var pNode = targetNode.getParentNode();
    if (pNode && pNode.dropInner === false) {
        return false;
    } else {
        for (var i = 0, l = curDragNodes.length; i < l; i++) {
            var curPNode = curDragNodes[i].getParentNode();
            if (curPNode && curPNode !== targetNode.getParentNode() && curPNode.childOuter === false) {
                return false;
            }
        }
    }
    return true;
}

function dropInner(treeId, nodes, targetNode) {
    if (targetNode && targetNode.dropInner === false) {
        return false;
    } else {
        for (var i = 0, l = curDragNodes.length; i < l; i++) {
            if (!targetNode && curDragNodes[i].dropRoot === false) {
                return false;
            } else if (curDragNodes[i].parentTId && curDragNodes[i].getParentNode() !== targetNode && curDragNodes[i].getParentNode().childOuter === false) {
                return false;
            }
        }
    }
    return true;
}

function dropNext(treeId, nodes, targetNode) {
    var pNode = targetNode.getParentNode();
    if (pNode && pNode.dropInner === false) {
        return false;
    } else {
        for (var i = 0, l = curDragNodes.length; i < l; i++) {
            var curPNode = curDragNodes[i].getParentNode();
            if (curPNode && curPNode !== targetNode.getParentNode() && curPNode.childOuter === false) {
                return false;
            }
        }
    }
    return true;
}

var log, className = "dark", curDragNodes, autoExpandNode;

function beforeDrag(treeId, treeNodes) {
    className = (className === "dark" ? "" : "dark");
    showLog("[ " + getTime() + " beforeDrag ]&nbsp;&nbsp;&nbsp;&nbsp; drag: " + treeNodes.length + " nodes.");
    for (var i = 0, l = treeNodes.length; i < l; i++) {
        if (treeNodes[i].drag === false) {
            curDragNodes = null;
            return false;
        } else if (treeNodes[i].parentTId && treeNodes[i].getParentNode().childDrag === false) {
            curDragNodes = null;
            return false;
        }
    }
    curDragNodes = treeNodes;
    return true;
}

function beforeDragOpen(treeId, treeNode) {
    autoExpandNode = treeNode;
    return true;
}

function beforeDrop(treeId, treeNodes, targetNode, moveType, isCopy) {
    className = (className === "dark" ? "" : "dark");
    showLog("[ " + getTime() + " beforeDrop ]&nbsp;&nbsp;&nbsp;&nbsp; moveType:" + moveType);
    showLog("target: " + (targetNode ? targetNode.name : "root") + "  - is " + (isCopy == null ? "cancel" : isCopy ? "copy" : "move"));
    return true;
}

function onDrag(event, treeId, treeNodes) {
    className = (className === "dark" ? "" : "dark");
    showLog("[ " + getTime() + " onDrag ]&nbsp;&nbsp;&nbsp;&nbsp; drag: " + treeNodes.length + " nodes.");
}

function onDrop(event, treeId, treeNodes, targetNode, moveType, isCopy) {
    className = (className === "dark" ? "" : "dark");
    showLog("[ " + getTime() + " onDrop ]&nbsp;&nbsp;&nbsp;&nbsp; moveType:" + moveType);
    showLog("target: " + (targetNode ? targetNode.name : "root") + "  - is " + (isCopy == null ? "cancel" : isCopy ? "copy" : "move"))
}

function onExpand(event, treeId, treeNode) {
    if (treeNode === autoExpandNode) {
        className = (className === "dark" ? "" : "dark");
        showLog("[ " + getTime() + " onExpand ]&nbsp;&nbsp;&nbsp;&nbsp;" + treeNode.name);
    }
}

function showLog(str) {
    if (!log) log = $("#log");
    log.append("<li class='" + className + "'>" + str + "</li>");
    if (log.children("li").length > 8) {
        log.get(0).removeChild(log.children("li")[0]);
    }
}

function getTime() {
    var now = new Date(),
        h = now.getHours(),
        m = now.getMinutes(),
        s = now.getSeconds(),
        ms = now.getMilliseconds();
    return (h + ":" + m + ":" + s + " " + ms);
}

function setTrigger() {
    var zTree = $.fn.zTree.getZTreeObj("treeDemo");
    zTree.setting.edit.drag.autoExpandTrigger = $("#callbackTrigger").attr("checked");
}
